[gnome-build-meta/jjardon/3_34_fatal_warnings] project.conf: Use fatal-warnings instead deprecated fail-on-overlap

[Javier Jardón Cabezas <jjardon src gnome org>]

commit 01c3a29552db5f57e35911a818c7e17676b1a296
Author: Javier Jardón <jjardon gnome org>
Date:   Tue Sep 17 21:18:09 2019 +0100

    project.conf: Use fatal-warnings instead deprecated fail-on-overlap

 project.conf | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/project.conf b/project.conf
index 4d196f20..29103958 100644
--- a/project.conf
+++ b/project.conf
@@ -2,7 +2,7 @@
 name: gnome
 
 # The minimum base BuildStream format
-format-version: 11
+format-version: 14
 
 # Where elements are stored
 element-path: elements
@@ -14,7 +14,8 @@ ref-storage: project.refs
 artifacts:
   url: https://cache.gitlab.gnome.org:11001
 
-fail-on-overlap: true
+fatal-warnings:
+- overlaps
 
 # Options to specify for the project, these provide
 # command line switches which control the behavior of